.page-contact {
  --co-gap: clamp(18px, 2.6vw, 32px);
  --co-panel-bg: linear-gradient(160deg, rgba(11, 39, 64, 0.95), rgba(5, 25, 43, 0.94));
  padding-bottom: clamp(56px, 8vw, 110px);
  font-family: var(--ly-font-ui);
  background:
    radial-gradient(760px 460px at 84% -6%, rgba(53, 241, 196, 0.09), transparent 66%),
    radial-gradient(680px 420px at 3% 2%, rgba(124, 92, 255, 0.11), transparent 70%);
}

.page-contact .ly-section + .ly-section {
  margin-top: clamp(48px, 7vw, 96px);
}

.page-contact .co-intro {
  max-width: 64ch;
  margin: 14px 0 0;
  color: var(--ly-text-soft);
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  padding: clamp(16px, 3vw, 36px) 0 clamp(40px, 6vw, 72px);
}

.page-contact .co-hero__grid {
  display: grid;
  gap: var(--co-gap);
  align-items: center;
}

.page-contact .co-hero__title {
  margin: 14px 0 0;
  font-family: var(--ly-font-display);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ly-white);
}

.page-contact .co-hero__copy .ly-lede {
  max-width: 48ch;
  margin-top: 18px;
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .co-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-contact .co-stat__num {
  font-family: var(--ly-font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--ly-cyan);
}

.page-contact .co-stat__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--ly-mist);
}

.page-contact .co-hero__visual {
  position: relative;
  margin: 0;
}

.page-contact .co-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--ly-radius-lg);
  object-fit: cover;
}

.page-contact .co-hero__visual .ly-media__cap {
  display: block;
  margin-top: 12px;
}

/* ---------- 合作方向选择器 ---------- */
.page-contact .co-picker {
  position: relative;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-contact .co-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.page-contact .co-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .co-tabs label {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-pill);
  background: rgba(11, 39, 64, 0.6);
  color: var(--ly-mist);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 220ms var(--ly-ease), color 220ms var(--ly-ease), border-color 220ms var(--ly-ease);
}

.page-contact .co-tabs label:hover {
  color: var(--ly-white);
  border-color: var(--ly-violet);
}

.page-contact .co-radio:nth-of-type(1):checked ~ .co-tabs label:nth-child(1),
.page-contact .co-radio:nth-of-type(2):checked ~ .co-tabs label:nth-child(2),
.page-contact .co-radio:nth-of-type(3):checked ~ .co-tabs label:nth-child(3),
.page-contact .co-radio:nth-of-type(4):checked ~ .co-tabs label:nth-child(4) {
  background: var(--ly-coral);
  border-color: var(--ly-coral);
  color: var(--ly-abyss);
}

.page-contact .co-radio:nth-of-type(1):focus-visible ~ .co-tabs label:nth-child(1),
.page-contact .co-radio:nth-of-type(2):focus-visible ~ .co-tabs label:nth-child(2),
.page-contact .co-radio:nth-of-type(3):focus-visible ~ .co-tabs label:nth-child(3),
.page-contact .co-radio:nth-of-type(4):focus-visible ~ .co-tabs label:nth-child(4) {
  outline: 2px solid var(--ly-cyan);
  outline-offset: 3px;
}

.page-contact .co-panels {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-contact .co-panel {
  display: none;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background: var(--co-panel-bg);
}

.page-contact .co-radio:nth-of-type(1):checked ~ .co-panels .co-panel:nth-child(1),
.page-contact .co-radio:nth-of-type(2):checked ~ .co-panels .co-panel:nth-child(2),
.page-contact .co-radio:nth-of-type(3):checked ~ .co-panels .co-panel:nth-child(3),
.page-contact .co-radio:nth-of-type(4):checked ~ .co-panels .co-panel:nth-child(4) {
  display: block;
}

.page-contact .co-panel__title {
  margin: 0;
  font-family: var(--ly-font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ly-white);
}

.page-contact .co-panel__grid {
  display: grid;
  gap: 22px;
  margin-top: 20px;
}

.page-contact .co-block__title {
  margin: 0;
  font-family: var(--ly-font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ly-cyan);
}

.page-contact .co-block__list {
  display: grid;
  gap: 9px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-block__list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ly-text);
}

.page-contact .co-block__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ly-coral);
}

/* ---------- 洽谈前准备清单 ---------- */
.page-contact .co-list {
  display: grid;
  gap: 16px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-list__item {
  padding: 24px 24px 24px 26px;
  border-left: 3px solid var(--ly-coral);
  border-radius: var(--ly-radius-md);
  background: rgba(11, 39, 64, 0.72);
}

.page-contact .co-list__num {
  font-family: var(--ly-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ly-mist);
}

.page-contact .co-list__title {
  margin: 10px 0 8px;
  font-size: 19px;
  font-weight: 600;
  color: var(--ly-white);
}

.page-contact .co-list__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ly-text-soft);
}

/* ---------- 洽谈流程 ---------- */
.page-contact .co-flow__banner {
  position: relative;
  margin: clamp(24px, 3vw, 36px) 0 clamp(26px, 3.4vw, 40px);
  border-radius: var(--ly-radius-lg);
  overflow: hidden;
  border: 1px solid var(--ly-line);
}

.page-contact .co-flow__banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .co-steps {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-step {
  padding-top: 18px;
  border-top: 2px solid var(--ly-line);
}

.page-contact .co-step summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 4px;
  list-style: none;
  cursor: pointer;
}

.page-contact .co-step summary::-webkit-details-marker {
  display: none;
}

.page-contact .co-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ly-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--ly-cyan);
}

.page-contact .co-step details[open] summary::after {
  content: "−";
}

.page-contact .co-step__num {
  font-family: var(--ly-font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--ly-coral);
}

.page-contact .co-step__title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ly-white);
}

.page-contact .co-step__body {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ly-text-soft);
}

/* ---------- 响应节奏 ---------- */
.page-contact .co-pace__grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-contact .co-pace__card {
  padding: 26px 24px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background: rgba(11, 39, 64, 0.7);
}

.page-contact .co-pace__num {
  display: block;
  font-family: var(--ly-font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ly-cyan);
}

.page-contact .co-pace__label {
  display: block;
  margin-top: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ly-white);
}

.page-contact .co-pace__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ly-text-soft);
}

/* ---------- 常见合作场景 ---------- */
.page-contact .co-scenes__grid {
  display: grid;
  gap: 16px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .co-scene {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background: linear-gradient(150deg, rgba(11, 39, 64, 0.9), rgba(5, 25, 43, 0.85));
}

.page-contact .co-scene__tag {
  font-family: var(--ly-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ly-yellow);
}

.page-contact .co-scene__title {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 600;
  color: var(--ly-white);
}

.page-contact .co-scene__text {
  flex: 1;
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ly-text-soft);
}

.page-contact .co-scene__link {
  align-self: flex-start;
  padding-bottom: 2px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ly-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 241, 196, 0.4);
  transition: color 200ms var(--ly-ease), border-color 200ms var(--ly-ease);
}

.page-contact .co-scene__link:hover {
  color: var(--ly-white);
  border-color: var(--ly-white);
}

/* ---------- 联系渠道 ---------- */
.page-contact .co-channel__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-contact .co-channel {
  padding: 1px;
  border-radius: var(--ly-radius-lg);
  background: linear-gradient(140deg, rgba(255, 107, 74, 0.9), rgba(53, 241, 196, 0.5) 48%, rgba(124, 92, 255, 0.6));
}

.page-contact .co-channel__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 26px 24px 28px;
  border-radius: 27px;
  background: var(--ly-abyss);
}

.page-contact .co-channel__label {
  display: block;
  font-family: var(--ly-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ly-mist);
}

.page-contact .co-channel__value {
  display: block;
  margin-top: 14px;
  font-family: var(--ly-font-mono);
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ly-white);
  word-break: break-word;
}

.page-contact .co-channel--addr .co-channel__value {
  font-family: var(--ly-font-ui);
  line-height: 1.65;
}

.page-contact .co-channel__note {
  flex: 1;
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ly-text-soft);
}

.page-contact .co-channel__actions {
  margin-top: 20px;
}

/* ---------- 波纹与收尾 ---------- */
.page-contact .co-ripple {
  height: clamp(70px, 11vw, 130px);
  margin-top: clamp(40px, 6vw, 72px);
  border-radius: var(--ly-radius-lg);
  overflow: hidden;
  background:
    repeating-radial-gradient(circle at 50% 132%, transparent 0 26px, rgba(53, 241, 196, 0.15) 26px 27px),
    repeating-radial-gradient(circle at 50% 132%, transparent 0 44px, rgba(255, 107, 74, 0.1) 44px 45px),
    linear-gradient(180deg, rgba(11, 39, 64, 0), rgba(11, 39, 64, 0.55));
}

.page-contact .co-outro {
  display: grid;
  gap: 18px;
  margin-top: 26px;
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid var(--ly-line);
  border-radius: var(--ly-radius-lg);
  background: rgba(11, 39, 64, 0.6);
}

.page-contact .co-outro__text {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ly-text);
}

.page-contact .co-outro .ly-btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .co-scenes__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 760px) {
  .page-contact .co-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .co-panel__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .page-contact .co-pace__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 800px) {
  .page-contact .co-channel__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .co-outro {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-contact .co-hero__visual img {
    border-radius: 0;
    clip-path: polygon(0 4%, 100% 0, 100% 96%, 0 100%);
  }

  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
  }

  .page-contact .co-step__title {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-tabs label,
  .page-contact .co-scene__link {
    transition: none;
  }
}